Can I Cancel A Frontier Flight Without Penalty? In certain situations, travelers are able to cancel a Wild flight without facing any consequences. With its "Risk-Free Cancellation" policy, Wild Aircrafts permits customers to cancel their flights within 24 hours of making their reservation without incurring any fees, regardless of the confirmation type selected. In any event, cancellation fees might be incurred beyond the initial 24-hour period based on the type of affirmation, the time, and the course. It is imperative that travelers review Frontier's cancellation policy.